.grade-statistics {
  padding: 20px;
  
  .el-card {
    border-radius: 8px;
    box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
    
    .el-card__header {
      font-size: 18px;
      font-weight: bold;
      color: #333;
      border-bottom: 1px solid #ebeef5;
    }
  }
  
  .el-row {
    margin-bottom: 20px;
    
    .el-col {
      text-align: center;
      
      .el-statistic {
        .el-statistic__head {
          font-size: 14px;
          color: #666;
          margin-bottom: 10px;
        }
        
        .el-statistic__content {
          font-size: 24px;
          font-weight: bold;
          color: #333;
        }
      }
    }
  }
  
  .chart-container {
    h4 {
      margin-bottom: 15px;
      font-size: 16px;
      color: #333;
    }
    
    #gradeChart {
      width: 100%;
    }
  }
}